diff --git a/drivers/bus/vdev/Makefile b/drivers/bus/vdev/Makefile index 24d424a383..bd0bb8955e 100644 --- a/drivers/bus/vdev/Makefile +++ b/drivers/bus/vdev/Makefile @@ -10,6 +10,7 @@ LIB = librte_bus_vdev.a CFLAGS += -O3 CFLAGS += $(WERROR_FLAGS) +CFLAGS += -DALLOW_EXPERIMENTAL_API # versioning export map EXPORT_MAP := rte_bus_vdev_version.map diff --git a/drivers/bus/vdev/meson.build b/drivers/bus/vdev/meson.build index 03cb87eb47..2ee648b495 100644 --- a/drivers/bus/vdev/meson.build +++ b/drivers/bus/vdev/meson.build @@ -3,3 +3,5 @@ sources = files('vdev.c') install_headers('rte_bus_vdev.h') + +allow_experimental_apis = true diff --git a/drivers/bus/vdev/vdev.c b/drivers/bus/vdev/vdev.c index 70964f54a3..38ed70a7f0 100644 --- a/drivers/bus/vdev/vdev.c +++ b/drivers/bus/vdev/vdev.c @@ -18,11 +18,14 @@ #include #include #include +#include #include #include "rte_bus_vdev.h" #include "vdev_logs.h" +#define VDEV_MP_KEY "bus_vdev_mp" + int vdev_logtype_bus; /* Forward declare to access virtual bus name */ @@ -316,6 +319,79 @@ rte_vdev_uninit(const char *name) return ret; } +struct vdev_param { +#define VDEV_SCAN_REQ 1 +#define VDEV_SCAN_ONE 2 +#define VDEV_SCAN_REP 3 + int type; + int num; + char name[RTE_DEV_NAME_MAX_LEN]; +}; + +static int vdev_plug(struct rte_device *dev); + +/** + * This function works as the action for both primary and secondary process + * for static vdev discovery when a secondary process is booting. + * + * step 1, secondary process sends a sync request to ask for vdev in primary; + * step 2, primary process receives the request, and send vdevs one by one; + * step 3, primary process sends back reply, which indicates how many vdevs + * are sent. + */ +static int +vdev_action(const struct rte_mp_msg *mp_msg, const void *peer) +{ + struct rte_vdev_device *dev; + struct rte_mp_msg mp_resp; + struct vdev_param *ou = (struct vdev_param *)&mp_resp.param; + const struct vdev_param *in = (const struct vdev_param *)mp_msg->param; + const char *devname; + int num; + + strlcpy(mp_resp.name, VDEV_MP_KEY, sizeof(mp_resp.name)); + mp_resp.len_param = sizeof(*ou); + mp_resp.num_fds = 0; + + switch (in->type) { + case VDEV_SCAN_REQ: + ou->type = VDEV_SCAN_ONE; + ou->num = 1; + num = 0; + + rte_spinlock_lock(&vdev_device_list_lock); + TAILQ_FOREACH(dev, &vdev_device_list, next) { + devname = rte_vdev_device_name(dev); + if (strlen(devname) == 0) { + VDEV_LOG(INFO, "vdev with no name is not sent"); + continue; + } + VDEV_LOG(INFO, "send vdev, %s", devname); + strlcpy(ou->name, devname, RTE_DEV_NAME_MAX_LEN); + if (rte_mp_sendmsg(&mp_resp) < 0) + VDEV_LOG(ERR, "send vdev, %s, failed, %s", + devname, strerror(rte_errno)); + num++; + } + rte_spinlock_unlock(&vdev_device_list_lock); + + ou->type = VDEV_SCAN_REP; + ou->num = num; + if (rte_mp_reply(&mp_resp, peer) < 0) + VDEV_LOG(ERR, "Failed to reply a scan request"); + break; + case VDEV_SCAN_ONE: + VDEV_LOG(INFO, "receive vdev, %s", in->name); + if (insert_vdev(in->name, NULL, NULL) < 0) + VDEV_LOG(ERR, "failed to add vdev, %s", in->name); + break; + default: + VDEV_LOG(ERR, "vdev cannot recognize this message"); + } + + return 0; +} + static int vdev_scan(void) { @@ -323,6 +399,34 @@ vdev_scan(void) struct rte_devargs *devargs; struct vdev_custom_scan *custom_scan; + if (rte_mp_action_register(VDEV_MP_KEY, vdev_action) < 0 && + rte_errno != EEXIST) { + VDEV_LOG(ERR, "Failed to add vdev mp action"); + return -1; + } + + if (rte_eal_process_type() == RTE_PROC_SECONDARY) { + struct rte_mp_msg mp_req, *mp_rep; + struct rte_mp_reply mp_reply; + struct timespec ts = {.tv_sec = 5, .tv_nsec = 0}; + struct vdev_param *req = (struct vdev_param *)mp_req.param; + struct vdev_param *resp; + + strlcpy(mp_req.name, VDEV_MP_KEY, sizeof(mp_req.name)); + mp_req.len_param = sizeof(*req); + mp_req.num_fds = 0; + req->type = VDEV_SCAN_REQ; + if (rte_mp_request_sync(&mp_req, &mp_reply, &ts) == 0 && + mp_reply.nb_received == 1) { + mp_rep = &mp_reply.msgs[0]; + resp = (struct vdev_param *)mp_rep->param; + VDEV_LOG(INFO, "Received %d vdevs", resp->num); + } else + VDEV_LOG(ERR, "Failed to request vdev from primary"); + + /* Fall through to allow private vdevs in secondary process */ + } + /* call custom scan callbacks if any */ rte_spinlock_lock(&vdev_custom_scan_lock); TAILQ_FOREACH(custom_scan, &vdev_custom_scans, next) {